The defense focused on Di Maio's opinion of the positioning of Martin when Zimmerman fired the gun.

"It's my opinion that the muzzle of the gun, in this case was, two to four inches away from the skin," Di Maio said, "The muzzle of the gun was against the clothing, but the clothing itself had to be two to four inches away from the body at the time Mr. Martin was shot. This is consistent with Mr. Zimmerman's account that he, that Mr. Martin, was over him, leaning forward at the time he was shot."

He addressed injuries, or the lack thereof, on both Martin and Zimmerman, saying punches could have been thrown without resulting in bruises.

He said Trayvon Martin likely died in one to three minutes and could have been able to move - even speak - for a brief time following the gun shot, contradicting prior testimony from state witness medical examiner Dr. Shipping Bao who said he could have lived for one to 10 minutes but would not have been able to speak.

Di Maio also provided an explanation for the lack of blood and DNA evidence found on Martin's hands.

But the state fought back, Bernie De La Rionda asked Di Maio how Martin could have injured Zimmerman without getting blood on his hands, and whether Zimmerman could have injured himself.

The City Manager of Sanford took the stand, Norton Bonaporte testified about the day several phone recordings were played for members of Martin's family and their attorneys.

He told jurors the calls were played to the group as a courtesy before they were released to the public, and that no law enforcement were present because they did not view it as part of the investigation at the time.